The population density of India from 1901 to 2011 is shown in Statement 31. At the beginning of the twentieth century i.e. in 1901 the density of India was as low as 77 persons per sq. km.This steadily increased in each decade to reach 382 persons per sq. km. in 2011.he population density of India from 1901 to 2011 is shown in Statement 31. At the beginning of the twentieth century i.e. in 1901 the density of India was as low as 77 persons per sq. km.
How they can cause insomnia: Alpha-blockers are linked to decreased REM (rapid eye movement) sleep â the stage of sleep when people dream â and daytime sedation or sleepiness. The proportion of REM sleep drops markedly in old age, and people deprived of REM sleep can experience memory problems.
Causes of acute insomnia can include: 1  Significant life stress (job loss or change, death of a loved one, divorce, moving). 2  Illness. 3  Emotional or physical discomfort. 4  Environmental factors like noise, light, or extreme temperatures (hot or cold) that interfere with sleep.